bonjour
g (x) = 3 x - 20
g ( - 10 ) = - 30 - 20 = - 50
g ( - 5 ) = - 15 - 20 = - 35
g ( 0) = - 20
g ( 5 ) = 15 - 20 = - 5
g ( 10) = 30 - 20 = 10
g( 5 ) = - 5
g ( 10 ) = 10
M ( 1) = 3 - 20 = - 17 donc M ∉ courbe
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bonjour
g (x) = 3 x - 20
g ( - 10 ) = - 30 - 20 = - 50
g ( - 5 ) = - 15 - 20 = - 35
g ( 0) = - 20
g ( 5 ) = 15 - 20 = - 5
g ( 10) = 30 - 20 = 10
g( 5 ) = - 5
g ( 10 ) = 10
M ( 1) = 3 - 20 = - 17 donc M ∉ courbe